#
# bt_utils.py
# 
# Copyright 2004 Helsinki Institute for Information Technology (HIIT)
# and the authors.  All rights reserved.
# 
# Authors: Tero Hasu <tero.hasu@hut.fi>
#
# Some Bluetooth-related utilities, mainly for internal use.
#

# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.

def check_mac(address):
    def ishex(s):
        for c in s:
            if "0123456789abcdefABCDEF".find(c) == -1:
                return False
        return True

    array = address.split(':')
    if len(array) != 6:
        raise ValueError
    for s in array:
        if len(s) != 2 or not ishex(s):
            raise ValueError

def add_colons(s):
    s = str(s)
    return s[0:2] + ":" + s[2:4] + ":" + s[4:6] + ":" + \
           s[6:8] + ":" + s[8:10] + ":" + s[10:12]
